CVE-2019-12210

Public Exploit

Description

In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_file, that file descriptor is not closed when a new process is spawned. This leads to the file descriptor being inherited into the child process; the child process can then read from and write to it. This can leak sensitive information and also, if written to, be used to fill the disk or plant misinformation.

8.1

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.38%

Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory yubico.com

Affected: n/a n/a

References

Link	Tags
https://developers.yubico.com/pam-u2f/Release_Notes.html	release notes vendor advisory
https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62	third party advisory patch
http://www.openwall.com/lists/oss-security/2019/06/05/1	mailing list third party advisory exploit
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-12210?: CVE-2019-12210 has been scored as a high severity vulnerability.
How to fix CVE-2019-12210?: To fix CVE-2019-12210, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-12210 being actively exploited in the wild?: It is possible that CVE-2019-12210 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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